Sounds like your friend did the scuba ditch and recovery, and the scuba bailout. I've not heard of it being done blindfolded though. These are typically things that are asked of DM, AI and Instructors although it could also be done within any of the courses. The scuba bailout is actually easier to do than it sounds IMO.git-r-dun diver:.
I don't know what he had to do in the water that he never had to think of before so I can't clarify that.
Now let me say that he could have been Bull*****ing me but I doubt it. He told me that he had to remove and replace his gear underwater while blinddfolded. He told me that he had to dive to the bottom of the pool remove his gear and then swim to the top. Take a couple of breaths and dive down to put the gear back on. He said they had to assemble the gear blindfolded before they ever got in the pool. And last but not least they had to jump in the pool with their tank between their legs and their reg in hand. When they hit the water they had to turn the tank on and put the reg in their mouth to breath. Now that is stuff he never had to think about in OW. I know I did OW with him.
IMO these are good things to do as long as the students are given a thorough demonstration and ample time to practice each scenario. Properly done it builds one's confidence.